随笔分类 - suanpan
摘要：“技多不压身”。内卷时代对编译和虚拟机技术有所了解是极好的。可是JVM太庞大了。 这个 虽然只有10KB，但它包含玩具级C编译器和x86虚拟机，阅读它可以快速入门，当然门楣很高:-)。 它是 基本能看懂的C编译器 的改进版，混合使用了自顶向下和自底向上(bison)分析。 ① 你可以为它增加do语句
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摘要：Fabrice Bellard is a French computer programmer known for writing FFmpeg, QEMU, and the Tiny C Compiler 和许许多多别的。 我修改了下他写的otccelfn.c，增加/删除了一点功能，提高了可读性。
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摘要：ENIAC /ˈiniæk/ or /ˈeniæk/ Electronic Numerical Integrator And Computer. EDVAC (Electronic Discrete Variable Automatic Computer) was one of the earlie
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摘要：The suanpan (simplified Chinese: 算盘; traditional Chinese: 算盤; pinyin: suànpán), is an abacus of Chinese origin first described in a 190 CE book of the
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摘要：The first programmable computers for commercial sale, such as the UNIVAC I and the IBM 701 included features to make their operation simpler. They typ
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摘要：假设a和b都是8位二进制数，selection是1位，什么样的器件可以从a和b中选一个出来？ 好像只好用8个2-1 multiplexer，它们的sel都是selection. 每个multiplexer都可以写个真值表出来，内部用门电路实现。 不知道能否用更底层的电路，如"继电器"、"干簧管"、"
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摘要：一本讲FPGA的书里说：Because of complexity, the division operator cannot be synthesized automatically. We use an FSMD to implement the long-division algorithm
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摘要：TinyEMU (bellard.org) is a system emulator for the RISC-V and x86 architectures. Its purpose is to be small and simple while being complete. RISC-V vs
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摘要：Verilator is the fastest Verilog/SystemVerilog simulator. Verilator is invoked with parameters similar to GCC or Synopsys's VCS. It "Verilates" the sp
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摘要：我原以为就是个理念，没想到上网一搜，实物不少，似乎挺靠谱的。 RISC-V学习总结之历史与现状 - 冷冷北极 - 博客园 RISC-V生态架构浅析(认识RISC-V) - petercao - 博客园 RISC-V引入了Chisel: Constructing Hardware In a Scala
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摘要：>和==可以减完后判断符号位或是否全0。一般地，不能一上头把a,b,c和m,n都当输入来列真值表，比如它们都是32位。
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摘要：According to the Verilog standard, the execution of two always blocks can be scheduled in any order. This is known as a race condition. 比如我们想交换reg a和b
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摘要：当wire[3:0] a;时，assign y = | a; 和 assign y = a[3] | a[2] | a[1] | a[0]; 一样。这个叫reduction, python里有reduce和map函数。不精确地说，map对数组里的每个元素执行操作，n进n出；reduce也对每个元素执
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摘要：看了3个主帖: Nand Flash - 博客园 NAND Flash Memory Technology: The Basics of a Flash Memory Cell by Zachary Painter Technical Note NAND Flash 101: An Introduc
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摘要：From www.mentalfloss.com: The first recorded use of an introductory class being designated as "101" was in a University of Buffalo course catalog date
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摘要：Terminology in the electronics and computer industries can sometimes be confusing and overlapping. A Verilog funciton looks like functions in programm
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摘要：Computer Arithmetic and Verilog HDL Fundamentals by Joseph Cavanagh (z-lib.org).pdf Computer Architecture Tutorial Using an FPGA ARM Verilog Introduct
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摘要：仿真领域广大，历史悠久 A simulation is an approximate imitation of the operation of a process or system that represents its operation over time. Simulation is us
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摘要：如题，x是32位unsigned integer. 有Quake公式，(n+1)**2 - n**2 = 2n + 1, 即1+3=4, 4+5=9, 9+7=16 ... [说错了：Babbage difference and Quake's Fast Inverse Square Root -
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摘要：GitHub - lsils/benchmarks: EPFL logic synthesis benchmarks 有许多Verilog的.v文件可以下载。mem_ctrl.v 5万多行 2MB，变量名全是n+数字，几万行assign啊！ Verilog里转义标识符(escaped identif
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